Cooperation or Defect:Prisoner's Dilemma 基因间的博弈：合作还是对抗？ The Similarity and Differences Between Game Theory and Evolution BASICS 问：什么才是“好”？ Natural Defection Agame theory paradox calledthe Prisoner's Dilemma illustrates why the existence ofcooperation in nature is unexpected.Two 生命进化中的博弈 people face jail sentences for conspiring to oommit a crime Their sentences depend on whether they dlect tocooperate and remain silent or defect and confess tothe crime [see payaff table below].Because neither knows what the other will do,the rational 总原则： choice-the one that always offers the better payoff-is to defect. 有利自身生存 INDIVIDUAL2 COOPERATE DEFECT (remain silent) oks剑 TYnOIAIONI 2 years in jai 4years in jail 基因博弈特点：以长期利益论英雄 2 years in jail 1 year in jail 1.稳定性与多样性共存 2.可遗传性 1yearin jail 3 years in jail 3.可扩增性 4 years in jail 3 years injail基因间的博弈：合作还是对抗？ Cooperation or Defect: Prisoner’s Dilemma The Similarity and Differences Between Game Theory and Evolution 问：什么才是“好”？ 生命进化中的博弈 总原则： 有利自身生存 基因博弈特点：以长期利益论英雄 1. 稳定性与多样性共存 2. 可遗传性 3. 可扩增性